Scared of Heaven?

Have you ever been scared of God and/or Heaven? I don’t know why, but I’ll have random moments where I’m just scared of everything in my faith and everything around me. Of course I know Heaven is awesome and I’d join our Heavenly Father, but I don’t know why I feel scared. Also, side question I’ve always been wondering about, do we also rejoin our dead family members? I think that might be part of my fear because my family means so so much to me that it’s what makes me scared of them or me dying because I don’t know if I’ll ever see them again. I’m 16 and I know I shouldn’t worry about all of this but I am.